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Monday, October 19, 2026

Morgan Stanley Bank of America Merrill Lynch Trust 2017-C34: rating history

Page built October 19, 2026

Rating actions, action dates and public knowledge dates for Morgan Stanley Bank of America Merrill Lynch Trust 2017-C34.

Data as of loan data through September 2026; ratings as held in the dataset at 2026-10-13

← Morgan Stanley Bank of America Merrill Lynch Trust 2017-C34 · CMBS market

Rating actions recorded in the dataset cover 16 of the deal's 20 classes. Each action shows the date the agency took the action and the date it became publicly knowable in the published rating histories, as explained in the note at the foot of this page.

Migration summary

AgencyActionsUpgradesDowngradesWithdrawalsNet notch movementFirst downgrade
Fitch320150+34 notches over 9 classes2021-09-13
KBRA141040+8 notches over 16 classes2024-10-04
Moody's15000not yet reportedNone recorded

Net notch movement sums, over the classes with at least two recorded ratings from the agency, the difference between the last and first recorded rating in notches; a positive figure means the classes ended weaker than they began.

Actions by class

Class A-1

Fitch: current rating PIF

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedAAAnot yet reported2017-10-192026-10-01
Watch actionAAAPIFnot yet reported2021-09-152026-10-01

KBRA: current rating WR

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAAAnot yet reported2017-10-022026-10-01
New ratingAAAAAAnot yet reported2017-10-192026-10-01
No action code in sourceAAAAAAnot yet reported2018-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2019-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2020-10-092026-10-01
Watch actionAAAWRnot yet reported2021-09-242026-10-01

Moody's: current rating WR

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reported(P)Aaanot yet reported2017-10-042026-10-13
No action code in source(P)AaaAaanot yet reported2017-10-202026-10-13
Watch actionAaaWRnot yet reported2021-11-022026-10-13

Class A-2

Fitch: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedAAAnot yet reported2017-10-192026-10-01

KBRA: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAAAnot yet reported2017-10-022026-10-01
New ratingAAAAAAnot yet reported2017-10-192026-10-01
No action code in sourceAAAAAAnot yet reported2018-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2019-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2020-10-092026-10-01
No action code in sourceAAAAAAnot yet reported2021-10-082026-10-01
No action code in sourceAAAAAAnot yet reported2022-10-072026-10-01
No action code in sourceAAAAAAnot yet reported2023-10-062026-10-01
No action code in sourceAAAAAAnot yet reported2024-10-042026-10-01

Moody's: current rating Aaa

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reported(P)Aaanot yet reported2017-10-042026-10-13
No action code in source(P)AaaAaanot yet reported2017-10-202026-10-13

Class A-3

Fitch: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedAAAnot yet reported2017-10-192026-10-01

KBRA: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAAAnot yet reported2017-10-022026-10-01
New ratingAAAAAAnot yet reported2017-10-192026-10-01
No action code in sourceAAAAAAnot yet reported2018-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2019-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2020-10-092026-10-01
No action code in sourceAAAAAAnot yet reported2021-10-082026-10-01
No action code in sourceAAAAAAnot yet reported2022-10-072026-10-01
No action code in sourceAAAAAAnot yet reported2023-10-062026-10-01
No action code in sourceAAAAAAnot yet reported2024-10-042026-10-01

Moody's: current rating Aaa

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reported(P)Aaanot yet reported2017-10-042026-10-13
No action code in source(P)AaaAaanot yet reported2017-10-202026-10-13

Class A-4

Fitch: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedAAAnot yet reported2017-10-192026-10-01

KBRA: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAAAnot yet reported2017-10-022026-10-01
New ratingAAAAAAnot yet reported2017-10-192026-10-01
No action code in sourceAAAAAAnot yet reported2018-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2019-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2020-10-092026-10-01
No action code in sourceAAAAAAnot yet reported2021-10-082026-10-01
No action code in sourceAAAAAAnot yet reported2022-10-072026-10-01
No action code in sourceAAAAAAnot yet reported2023-10-062026-10-01
No action code in sourceAAAAAAnot yet reported2024-10-042026-10-01

Moody's: current rating Aaa

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reported(P)Aaanot yet reported2017-10-042026-10-13
No action code in source(P)AaaAaanot yet reported2017-10-202026-10-13

Class A-S

Fitch: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedAAAnot yet reported2017-10-192026-10-01

KBRA: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAAAnot yet reported2017-10-022026-10-01
New ratingAAAAAAnot yet reported2017-10-192026-10-01
No action code in sourceAAAAAAnot yet reported2018-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2019-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2020-10-092026-10-01
No action code in sourceAAAAAAnot yet reported2021-10-082026-10-01
No action code in sourceAAAAAAnot yet reported2022-10-072026-10-01
No action code in sourceAAAAAAnot yet reported2023-10-062026-10-01
No action code in sourceAAAAAAnot yet reported2024-10-042026-10-01

Moody's: current rating Aa3

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reported(P)Aa3not yet reported2017-10-042026-10-13
No action code in source(P)Aa3Aa3not yet reported2017-10-202026-10-13

Class A-SB

Fitch: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedAAAnot yet reported2017-10-192026-10-01

KBRA: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAAAnot yet reported2017-10-022026-10-01
New ratingAAAAAAnot yet reported2017-10-192026-10-01
No action code in sourceAAAAAAnot yet reported2018-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2019-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2020-10-092026-10-01
No action code in sourceAAAAAAnot yet reported2021-10-082026-10-01
No action code in sourceAAAAAAnot yet reported2022-10-072026-10-01
No action code in sourceAAAAAAnot yet reported2023-10-062026-10-01
No action code in sourceAAAAAAnot yet reported2024-10-042026-10-01

Moody's: current rating Aaa

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reported(P)Aaanot yet reported2017-10-042026-10-13
No action code in source(P)AaaAaanot yet reported2017-10-202026-10-13

Class B

Fitch: current rating A

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedAA-not yet reported2017-10-192026-10-01
DowngradeAA-Anot yet reported2025-05-202026-10-01

KBRA: current rating AA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAAnot yet reported2017-10-022026-10-01
New ratingAAAAnot yet reported2017-10-192026-10-01
No action code in sourceAAAAnot yet reported2018-10-112026-10-01
No action code in sourceAAAAnot yet reported2019-10-112026-10-01
No action code in sourceAAAAnot yet reported2020-10-092026-10-01
No action code in sourceAAAAnot yet reported2021-10-082026-10-01
No action code in sourceAAAAnot yet reported2022-10-072026-10-01
No action code in sourceAAAAnot yet reported2023-10-062026-10-01
No action code in sourceAAAAnot yet reported2024-10-042026-10-01

Class C

Fitch: current rating BBB

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedA-not yet reported2017-10-192026-10-01
DowngradeA-BBBnot yet reported2025-05-202026-10-01

KBRA: current rating A

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAnot yet reported2017-10-022026-10-01
New ratingAAnot yet reported2017-10-192026-10-01
No action code in sourceAAnot yet reported2018-10-112026-10-01
No action code in sourceAAnot yet reported2019-10-112026-10-01
No action code in sourceAAnot yet reported2020-10-092026-10-01
No action code in sourceAAnot yet reported2021-10-082026-10-01
No action code in sourceAAnot yet reported2022-10-072026-10-01
No action code in sourceAAnot yet reported2023-10-062026-10-01
No action code in sourceAAnot yet reported2024-10-042026-10-01

Class D

Fitch: current rating B

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedBBB-not yet reported2017-10-192026-10-01
DowngradeBBB-BBnot yet reported2022-08-312026-10-01
DowngradeBBBnot yet reported2025-05-202026-10-01

KBRA: current rating BBB-

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedBBB-not yet reported2017-10-022026-10-01
New ratingBBB-BBB-not yet reported2017-10-192026-10-01
No action code in sourceBBB-BBB-not yet reported2018-10-112026-10-01
No action code in sourceBBB-BBB-not yet reported2019-10-112026-10-01
No action code in sourceBBB-BBB-not yet reported2020-10-092026-10-01
No action code in sourceBBB-BBB-not yet reported2021-10-082026-10-01
No action code in sourceBBB-BBB-not yet reported2022-10-072026-10-01
No action code in sourceBBB-BBB-not yet reported2023-10-062026-10-01
No action code in sourceBBB-BBB-not yet reported2024-10-042026-10-01

Class E

Fitch: current rating CCC

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedBB-not yet reported2017-10-192026-10-01
DowngradeBB-B-not yet reported2021-09-132026-10-01
DowngradeB-CCCnot yet reported2022-08-312026-10-01

KBRA: current rating B

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedBB-not yet reported2017-10-022026-10-01
New ratingBB-BB-not yet reported2017-10-192026-10-01
No action code in sourceBB-BB-not yet reported2018-10-112026-10-01
No action code in sourceBB-BB-not yet reported2019-10-112026-10-01
No action code in sourceBB-BB-not yet reported2020-10-092026-10-01
No action code in sourceBB-BB-not yet reported2021-10-082026-10-01
No action code in sourceBB-BB-not yet reported2022-10-072026-10-01
No action code in sourceBB-BB-not yet reported2023-10-062026-10-01
DowngradeBB-Bnot yet reported2024-10-042026-10-01

Class F

Fitch: current rating CC

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedB-not yet reported2017-10-192026-10-01
DowngradeB-CCCnot yet reported2021-09-132026-10-01
DowngradeCCCCCnot yet reported2022-08-312026-10-01

KBRA: current rating CCC

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedB-not yet reported2017-10-022026-10-01
New ratingB-B-not yet reported2017-10-192026-10-01
No action code in sourceB-B-not yet reported2018-10-112026-10-01
No action code in sourceB-B-not yet reported2019-10-112026-10-01
No action code in sourceB-B-not yet reported2020-10-092026-10-01
No action code in sourceB-B-not yet reported2021-10-082026-10-01
No action code in sourceB-B-not yet reported2022-10-072026-10-01
No action code in sourceB-B-not yet reported2023-10-062026-10-01
DowngradeB-CCCnot yet reported2024-10-042026-10-01

Class X-A

Fitch: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedAAAnot yet reported2017-10-192026-10-01

KBRA: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAAAnot yet reported2017-10-022026-10-01
New ratingAAAAAAnot yet reported2017-10-192026-10-01
No action code in sourceAAAAAAnot yet reported2018-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2019-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2020-10-092026-10-01
No action code in sourceAAAAAAnot yet reported2021-10-082026-10-01
No action code in sourceAAAAAAnot yet reported2022-10-072026-10-01
No action code in sourceAAAAAAnot yet reported2023-10-062026-10-01
No action code in sourceAAAAAAnot yet reported2024-10-042026-10-01

Moody's: current rating Aaa

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reported(P)Aaanot yet reported2017-10-042026-10-13
No action code in source(P)AaaAaanot yet reported2017-10-202026-10-13

Class X-B

Fitch: current rating BBB

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedA-not yet reported2017-10-192026-10-01
DowngradeA-BBBnot yet reported2025-05-202026-10-01

KBRA: current rating AAA

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedAAAnot yet reported2017-10-022026-10-01
New ratingAAAAAAnot yet reported2017-10-192026-10-01
No action code in sourceAAAAAAnot yet reported2018-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2019-10-112026-10-01
No action code in sourceAAAAAAnot yet reported2020-10-092026-10-01
No action code in sourceAAAAAAnot yet reported2021-10-082026-10-01
No action code in sourceAAAAAAnot yet reported2022-10-072026-10-01
No action code in sourceAAAAAAnot yet reported2023-10-062026-10-01
No action code in sourceAAAAAAnot yet reported2024-10-042026-10-01

Class X-D

Fitch: current rating B

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedBBB-not yet reported2017-10-192026-10-01
DowngradeBBB-BBnot yet reported2022-08-312026-10-01
DowngradeBBBnot yet reported2025-05-202026-10-01

KBRA: current rating BBB-

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedBBB-not yet reported2017-10-022026-10-01
New ratingBBB-BBB-not yet reported2017-10-192026-10-01
No action code in sourceBBB-BBB-not yet reported2018-10-112026-10-01
No action code in sourceBBB-BBB-not yet reported2019-10-112026-10-01
No action code in sourceBBB-BBB-not yet reported2020-10-092026-10-01
No action code in sourceBBB-BBB-not yet reported2021-10-082026-10-01
No action code in sourceBBB-BBB-not yet reported2022-10-072026-10-01
No action code in sourceBBB-BBB-not yet reported2023-10-062026-10-01
No action code in sourceBBB-BBB-not yet reported2024-10-042026-10-01

Class X-E

Fitch: current rating CCC

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedBB-not yet reported2017-10-192026-10-01
DowngradeBB-B-not yet reported2021-09-132026-10-01
DowngradeB-CCCnot yet reported2022-08-312026-10-01

KBRA: current rating B

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedBB-not yet reported2017-10-022026-10-01
New ratingBB-BB-not yet reported2017-10-192026-10-01
No action code in sourceBB-BB-not yet reported2018-10-112026-10-01
No action code in sourceBB-BB-not yet reported2019-10-112026-10-01
No action code in sourceBB-BB-not yet reported2020-10-092026-10-01
No action code in sourceBB-BB-not yet reported2021-10-082026-10-01
No action code in sourceBB-BB-not yet reported2022-10-072026-10-01
No action code in sourceBB-BB-not yet reported2023-10-062026-10-01
DowngradeBB-Bnot yet reported2024-10-042026-10-01

Class X-F

Fitch: current rating CC

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
New ratingnot yet reportedB-not yet reported2017-10-192026-10-01
DowngradeB-CCCnot yet reported2021-09-132026-10-01
DowngradeCCCCCnot yet reported2022-08-312026-10-01

KBRA: current rating CCC

ActionPrior ratingRatingOutlook / watch afterAction datePublicly knowable
No action code in sourcenot yet reportedB-not yet reported2017-10-022026-10-01
New ratingB-B-not yet reported2017-10-192026-10-01
No action code in sourceB-B-not yet reported2018-10-112026-10-01
No action code in sourceB-B-not yet reported2019-10-112026-10-01
No action code in sourceB-B-not yet reported2020-10-092026-10-01
No action code in sourceB-B-not yet reported2021-10-082026-10-01
No action code in sourceB-B-not yet reported2022-10-072026-10-01
No action code in sourceB-B-not yet reported2023-10-062026-10-01
DowngradeB-CCCnot yet reported2024-10-042026-10-01

Action date is the date the agency took the rating action. Publicly knowable is the publication date of the agency's rating history file, published under SEC Rule 17g-7(b), in which the action is recorded in this dataset. The dataset holds each agency's current published history, so the publicly knowable date is the current file's date and is an upper bound on when the action first became public in this form: earlier editions of the file carried older actions sooner. Actions labeled "No action code in source" are records the agency's file carries without a rating action code, principally affirmations and outlook or watch updates; the rating shown is the rating recorded with the record. Outlook and watch states are shown as recorded after each action, so the state in force between two actions is the state shown on the earlier row.